Jambs g b i



J. GRIMES.

Gookin-g Sto-ve.

Patented Aug. 267, 1867.

WIT/VESSS." @fw @nitro faire strat ffice.

JAMES carnes., or Ario arsMo urn",` o H10. Lenser Pamela. 67,977, datedAugust 20,1867.

IMPROVEMENT IN TOPS 0F COOKING-STOVES.

TOv ALL WHOM IT MAY CONERN:

Be it.knonm that I, JAMES GTRIMES, of Portsmouth, in the county ofScioto,an'd State of' Ohio, have invented a new'and useful Improvementin Stoves; and I do hereby declare that the following is a full, clear,and exact description thereof', which will enable VAothers skilled in*the art to make andV use the-same, reference being had to theaccompanying' drawings, forming part of this specification, in which-`Eignrel is the upper side of the top plate of a cook-stove, showing myimproved expansion rim attached thereto.

Figure 2 isa view ofthe under side of the same.

Figure 3 is a vertical section in the line x x, figs. 1 and 2.

Figure 4, is a partial detached view of' the stove-plate.

Similar letters of reference indicate like parts.

This invention relates to an improvement in the construction ot'cast-iron cook and other stoves, to provide for excessi've expansionandjsudden contraction of the top" plate, and;A thereby prevent thegeneral injury res-ulting therefrom -to thefivhole stove by thederangementoi' all the other plates, which depend upon their 'relation vto and connection With-the Atop plate'forl keeping their'proper placesin all cook-stoves. 'lthii's object is effected by means of anindependent rim around the topplate of a euokstovc, which-is keptcomparatively cool, and is` not subject to undue ekpasion andcontraction, like the top plate, to which rim the sideplates ot' thestove are fitted, and consequently keep their places n'itliout injuryfrom heat'. The main tops of stoves are often cracked by excess of heatand sudden contractionby spilling wateron them when-hot, 4and thus ,allthe other plates are 'disarranged. By my'improflerl expansion-rim thisdiiiculty is Aentirely o'nviated. Iii fig. 1 isMshown theupper side, andin fig. 2 the under side of the top plate of a eookstove, with an innermain plate, A, havingl the pot-holes and other 'connections as usual,and an outer rim, B, which surrounds the main plate A, which may' be inone or more picces',`\and is fastened to the main plate orA plates byscrew-bolts a `a,\ vhich pass through lugs I) D on the sides ofthe plateA. The holes in the lugs 6 la are made large, so that the bolts a a mayenter them loosely, 'and,'having their nuts a little loose, admit ofsome side play, to allow the 'expansion and contraction oi`Y the inner.plate A independently of the rim B.'

It will be observed that with this arrangement the main plate A mayexpand and contract freely without affecting the outer-'rim B, andconsequently' that the other platos of the 'stove will not be derangedor injured by'excessive heat in the stove or sud-den contraction. Myimprovement of an independent expansion rim lmay be modified in itsarrangcment'in connection with the main plate or plates of a stove, andmay be made in one or more pieces.

Having thusrdescribed my invention, I claim as new,'and desire totsecureby Letters Patent'- The rim B, constructed in one or more pieces,secured to thelugs 6 bofthe plate A, by means of screwbolts passingthrough the lugs, said holes being enlarged to admit of the expansionand contraction of the plate A independently of the rim B, as hereinshown and described.

JAMES GRIMES.

Witnesses:

Gsonen R. Gamas WM. Galates.

